Adding some new DumpAccessibilityTree tests, tweaking DumpAccessibilityTree helpers and fixing a bug

content/browser/accessibility/browser_accessibility_cocoa.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_COCOA_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/memory/scoped_nsobject.h"
@@ skipping 25 matching lines @@
 // the accessibility children of this object.
 @property(nonatomic, readonly) NSArray* children;
 @property(nonatomic, readonly) NSArray* columns;
 @property(nonatomic, readonly) NSString* description;
 @property(nonatomic, readonly) NSNumber* enabled;
 @property(nonatomic, readonly) NSNumber* focused;
 @property(nonatomic, readonly) NSString* help;
 // isIgnored returns whether or not the accessibility object
 // should be ignored by the accessibility hierarchy.
 @property(nonatomic, readonly, getter=isIgnored) BOOL ignored;
+@property(nonatomic, readonly) NSString* invalid;
 // The origin of this object in the page's document.
 // This is relative to webkit's top-left origin, not Cocoa's
 // bottom-left origin.
 @property(nonatomic, readonly) NSPoint origin;
 @property(nonatomic, readonly) NSNumber* numberOfCharacters;
 @property(nonatomic, readonly) id parent;
 @property(nonatomic, readonly) NSValue* position;
 // A string indicating the role of this object as far as accessibility
 // is concerned.
 @property(nonatomic, readonly) NSString* role;
 @property(nonatomic, readonly) NSString* roleDescription;
 @property(nonatomic, readonly) NSArray* rows;
 // The size of this object.
 @property(nonatomic, readonly) NSValue* size;
 // A string indicating the subrole of this object as far as accessibility
 // is concerned.
 @property(nonatomic, readonly) NSString* subrole;
 // The tabs owned by a tablist.
 @property(nonatomic, readonly) NSArray* tabs;
 @property(nonatomic, readonly) NSString* title;
 @property(nonatomic, readonly) NSString* url;
 @property(nonatomic, readonly) NSString* value;
 @property(nonatomic, readonly) NSValue* visibleCharacterRange;
 @property(nonatomic, readonly) NSNumber* visited;
 @property(nonatomic, readonly) id window;
 @end
 
 #endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_COCOA_H_